CN103144270B - Method of preparing high interface bonding intensity wood-plastic composite in co-extrusion mode - Google Patents
Method of preparing high interface bonding intensity wood-plastic composite in co-extrusion mode Download PDFInfo
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- CN103144270B CN103144270B CN201310021367.7A CN201310021367A CN103144270B CN 103144270 B CN103144270 B CN 103144270B CN 201310021367 A CN201310021367 A CN 201310021367A CN 103144270 B CN103144270 B CN 103144270B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/87—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
Abstract
The invention relates to a mould and a method of preparing a wood-plastic composite in a co-extrusion mode, in particular to a mould and a method of preparing a high interface bonding intensity wood-plastic composite in a co-extrusion mode. The mould and the method of preparing the high interface bonding intensity wood-plastic composite in a co-extrusion mode resolve the technical problem that an existing wood-plastic composite is poor in interface bonding intensity. The method of preparing the high interface bonding intensity wood-plastic composite in a co-extrusion mode comprises the following steps: a mould temperature control device, a cooling device and a extruding machine threaded rod are adjusted at first, the pressure and temperature are controlled, then materials on a core layer and a surface layer are enabled to pass the mould in sequence, and the high interface bonding intensity wood-plastic composite is prepared in a co-extrusion mode. The interface bonding intensity is 3.0-3.5 Mpas, compared with the existing wood-plastic composite, the interface bonding intensity is improved by 0.7-6 times. The thickness of the surface layer can be adjusted by changing the pressure in a surface layer material flow passageway, and the covering surface can be flexibly changed according to designs of different moulds. The mould is simple in design, easy to machine, and capable of being used in the field of processing of wood-plastic composites.
Description
Technical field
The present invention relates to the method for a kind of co-extrusion for wood plastic composite.
Background technology
Current coextrusion wood plastic composite, its forming process need complete in two moulds, first shaping, rear coated, in preparation process, when forming boundary layer, the top layer of sandwich layer material is in the state of cooling, and sandwich layer and top layer material are in a mold without mutual pressure effect, cause sandwich layer and top layer interface bond strength poor, and forming process need two equipment, higher to the requirement on machining accuracy of screw rod, expense cost is higher, and device structure is complicated.
The existing patent No. is the Chinese patent " top layer co-extruding sandwich layer foaming extrusion dies " of 200420109040.1, which disclose a kind of surperficial co-squeezing core layer foaming co-extruding mould, its mouth mould comprises foamed material extrusion channel, foamed material foam chamber, heat-insulation chamber, co-extrusion material extrusion channel, composite co-extruding runner, foaming extrusion channel and co-extrusion material extrusion channel conflux before mouth and are provided with foam chamber, can carry out co-extrusion after hot melt foaming process completes.And be provided with heat-insulation chamber between cooling device and co-extruding flow channel, both ensure that the temperature of co-extrusion and foaming is not by the impact of cooling device, guarantees again to complete co-extrusion smoothly after co-extrusion foaming.This technology primary focus emphasizes the foaming problems in co-extruding mould, co-extrusion interface problem is not related to, separately have the patent No. be 200810222658.1 Chinese patent " composite material and manufacture method thereof at plastics/Wood-plastic profiles Surface coating wood skin ", which disclose a kind of composite material at plastics/Wood-plastic profiles Surface coating wood skin and manufacture method thereof, interface cohesion adopts the inner surface applying hot melt adhesives stick at wooden skin, and interface affinity agent is coated with to the surface to be covered of the plastics/Wood-plastic profiles carrying out decontamination dust process, by the moulding running roller of coating machine, wooden roller pressure is coated on the surface of plastics/Wood-plastic profiles.The method increase the cohesive force between wooden skin and plastics/Wood-plastic profiles surface, but although this skill patent relate to interface problem, but what its top layer and sandwich layer combined employing is traditional bonding mode, adhesive and affinity agent must be used, make wood plastic composite boundary strength low, be generally 0.5 ~ 1.8MPa, if be therefore necessary for the wood plastic composite preparing high interfacial bonding strength.
Summary of the invention
The present invention is for solving the low technical problem of existing wood plastic composite interface bond strength, and provides a kind of co-extrusion for the method for high interfacial bonding strength wood plastic composite.
A kind of co-extrusion of the present invention is made up of sandwich layer runner 1, top layer runner 2, co-extruding flow channel 3, stock mould 4, cooling frame 5, lengthening mouth mould 6, top layer mouth mould 7, sandwich layer mouth mould 8, flange 9, attemperating unit 10, cooling device 11, thermal insulation board 12 and screw rod 13 for the mould of high interfacial bonding strength wood plastic composite; Distance between the entrance exporting to top layer runner 2 of its center core layer runner 1 is not less than 5mm, the meet of the outlet of sandwich layer runner 1 and the entrance of top layer runner 2 is arranged to rounded corner, attemperating unit 10 is positioned at top layer mouth mould 7 and sandwich layer mouth mould 8 is inner, cooling device 11 is positioned at stock mould 4 and cooling frame 5 is inner, thermal insulation board 12 is between top layer mouth mould 7 and sandwich layer mouth mould 8, and it is inner that screw rod 13 is positioned at top layer runner 2.
By the method for mould co-extrusion of the present invention for high interfacial bonding strength wood plastic composite, it is characterized in that this preparation method carries out according to the following steps:
One, attemperating unit 10 and cooling device 11 is regulated respectively, the temperature of top layer mouth mould 7 and sandwich layer mouth mould 8 is made to be 135 ~ 180 DEG C, the temperature of stock mould 4 and cooling frame 5 is made to be 15 ~ 80 DEG C, skin depth adjusting screw(rod) 13 needed for the high interfacial bonding strength coextrusion wood plastic composite of preparation, regulates pressure;
Two, make sandwich layer material under molten condition under motive force effect from sandwich layer runner 1 successively by flange 9, sandwich layer mouth mould 8 and thermal insulation board 12, in the top layer mixing of materials of the molten condition that mouth mould 7 place, top layer and top layer runner 2 go out to extrude, and then respectively by co-extruding flow channel 3, lengthening mouth mould 6, cooling frame 5 and stock mould 4, obtain high interfacial bonding strength wood plastic composite.
A kind of co-extrusion of the present invention is for the mould of high interfacial bonding strength wood plastic composite and method, advantage is the coextrusion wood plastic composite preparing high interfacial bonding strength in same mould, achieve sandwich layer and top layer material in molten condition, coextrusion boundary layer is formed under mutual pressure effect, sandwich layer and top layer interface matrix molecule are wound around mutually, weaken and even eliminate interface, realize table, the coextru-lamination of sandwich layer high strength, certain distance is left between the outlet of sandwich layer runner 1 and the entrance of top layer runner 2, before sandwich layer material and top layer material are crossed, by a buffering area, increase sandwich layer material and top layer storeroom interaction force, top layer material is fully contacted in the molten state with sandwich layer material, the meet of the entrance of the outlet of sandwich layer runner 1 and top layer runner 2 is arranged to rounded corner simultaneously, be conducive to the flowing of sandwich layer material melt, avoid material gathering around the corner, in addition can according to core, top layer formula is different, core is regulated and controled by changing temperature and pressure, the viscosity of top layer melt, with the form of this control inerface, and raising interface bond strength, solve the problem of existing co-extrusion wood plastic composite interface bond strength difference, a kind of high interfacial bonding strength wood plastic composite of the present invention, its interface bond strength is 3.0MPa ~ 3.5MPa, 0.7 ~ 6 times is improve than existing wood plastic composite, also by changing pressure regulator gauge layer thickness in the material flow path of top layer, coated surface also can be changed according to the flexible design of different mould, Design of Dies is simple, be easy to processing.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of co-extrusion of the present invention for the mould of high interfacial bonding strength wood plastic composite;
Fig. 2 is the structural representation of the high interfacial bonding strength wood plastic composite of embodiment 1; Wherein 15 is top layer, and 16 is sandwich layer, and 17 is the interface of top layer 15 and sandwich layer 16.
Detailed description of the invention
Technical scheme of the present invention is not limited to following detailed description of the invention, also comprises any combination between each detailed description of the invention.
Detailed description of the invention one: a kind of co-extrusion of (composition graphs 1) present embodiment for the mould of high interfacial bonding strength wood plastic composite by sandwich layer runner 1, top layer runner 2, co-extruding flow channel 3, stock mould 4, cooling frame 5, lengthen mouth mould 6, top layer mouth mould 7, sandwich layer mouth mould 8, flange 9, attemperating unit 10, cooling device 11, thermal insulation board 12 and screw rod 13 and form; Distance between the entrance exporting to top layer runner 2 of its center core layer runner 1 is not less than 5mm, the meet of the outlet of sandwich layer runner 1 and the entrance of top layer runner 2 is arranged to rounded corner, attemperating unit 10 is positioned at top layer mouth mould 7 and sandwich layer mouth mould 8 is inner, cooling device 11 is positioned at stock mould 4 and cooling frame 5 is inner, thermal insulation board 12 is between top layer mouth mould 7 and sandwich layer mouth mould 8, and it is inner that screw rod 13 is positioned at top layer runner 2.
Detailed description of the invention two: present embodiment and detailed description of the invention one unlike: lengthening mouth mould 6 length is 30 ~ 50mm, distance between the entrance exporting to top layer runner 2 of sandwich layer runner 1 is 6 ~ 15mm, and other step is identical with detailed description of the invention one with parameter.
Detailed description of the invention three: present embodiment and detailed description of the invention one or two unlike: the rounded corner diameter of the meet of the outlet of sandwich layer runner 1 and the entrance of top layer runner 2 is 0.5 ~ 1.5 times of co-extruding flow channel 3 width, and other step is identical with detailed description of the invention one or two with parameter.
Detailed description of the invention four: a kind of co-extrusion of present embodiment, for the method for high interfacial bonding strength wood plastic composite, is characterized in that this preparation method carries out according to the following steps:
One, attemperating unit 10 and cooling device 11 is regulated respectively, the temperature of top layer mouth mould 7 and sandwich layer mouth mould 8 is made to be 135 ~ 180 DEG C, the temperature of stock mould 4 and cooling frame 5 is made to be 15 ~ 80 DEG C, skin depth adjusting screw(rod) 13 needed for the high interfacial bonding strength coextrusion wood plastic composite of preparation, regulates pressure;
Two, make sandwich layer material under molten condition under motive force effect from sandwich layer runner 1 successively by flange 9, sandwich layer mouth mould 8 and thermal insulation board 12, in the top layer mixing of materials of the molten condition that mouth mould 7 place, top layer and top layer runner 2 extrude, and then respectively by co-extruding flow channel 3, lengthening mouth mould 6, cooling frame 5 and stock mould 4, obtain high interfacial bonding strength wood plastic composite.
A kind of co-extrusion of present embodiment is for the mould of high interfacial bonding strength wood plastic composite and method, advantage is the coextrusion wood plastic composite preparing high interfacial bonding strength in same mould, achieve sandwich layer and top layer material in molten condition, coextrusion boundary layer is formed under mutual pressure effect, sandwich layer and top layer interface matrix molecule are wound around mutually, weaken and even eliminate interface, realize table, the coextru-lamination of sandwich layer high strength, certain distance is left between the outlet of sandwich layer runner 1 and the entrance of top layer runner 2, before sandwich layer material and top layer material are crossed, by a buffering area, increase sandwich layer material and top layer storeroom interaction force, top layer material is fully contacted in the molten state with sandwich layer material, the meet of the entrance of the outlet of sandwich layer runner 1 and top layer runner 2 is arranged to rounded corner simultaneously, be conducive to the flowing of sandwich layer material melt, avoid material gathering around the corner, in addition can according to core, top layer formula is different, core is regulated and controled by changing temperature and pressure, the viscosity of top layer melt, with the form of this control inerface, and raising interface bond strength, solve the problem of existing co-extrusion wood plastic composite interface bond strength difference, a kind of high interfacial bonding strength wood plastic composite of present embodiment, its interface bond strength is 3.0MPa ~ 3.5MPa, 0.7 ~ 6 times is improve than existing wood plastic composite, also by changing pressure regulator gauge layer thickness in the material flow path of top layer, coated surface also can be changed according to the flexible design of different mould, Design of Dies is simple, be easy to processing.
Detailed description of the invention five: present embodiment and detailed description of the invention four unlike: adjusting screw(rod) 13 in step one, make pressure be 3MPa ~ 25MPa, other step is identical with detailed description of the invention four with parameter.
Detailed description of the invention six: present embodiment and detailed description of the invention four or five unlike: step 2 center core layer material is wood powder, waste or used plastics and filler, and other step is identical with detailed description of the invention four or five with parameter.
Detailed description of the invention seven: one of present embodiment and detailed description of the invention four to six unlike: filler described in step 2 is maleic anhydride graft high density polyethylene (HDPE), Tissuemat E, paraffin and calcium powder, and other step is identical with one of parameter and detailed description of the invention four to six.
Detailed description of the invention eight: one of present embodiment and detailed description of the invention four to seven unlike: step 2 mesexine material is wood powder, plastics and functionalized, and other step is identical with one of parameter and detailed description of the invention four to seven.
Detailed description of the invention nine: one of present embodiment and detailed description of the invention four to eight unlike: functionalized described in step 2 be anti-ultraviolet ageing agent, fire retardant, antiseptic, waterproofing agent wherein one or more by the mixture of any ratio, other step is identical with one of parameter and detailed description of the invention four to eight.
Detailed description of the invention ten: one of present embodiment and detailed description of the invention four to nine are a kind of in Tissuemat E or paraffin or both are by the mixture of any ratio unlike: described lubricant, and other step is identical with one of parameter and detailed description of the invention four to nine.
With following verification experimental verification beneficial effect of the present invention:
Shown in embodiment 1, (composition graphs 1) a kind of Fig. 1, mould co-extrusion carries out according to the following steps for the method for high interfacial bonding strength wood plastic composite:
One, sandwich layer material is taken: take 60 parts of wood powders, 32 parts of Recycled HDPEs (HDPE) by mass fraction, its density is 0.95g/cm
3, 3 parts of maleic anhydride graft HDPE, its density is 0.95g/cm
3, 2 parts of Tissuemat E and 3 parts of calcium powders, be heated to molten condition after mixing;
Two, top layer material is taken: take 40 parts of wood powders, 52 parts of HDPE by mass fraction, its density is 0.95g/cm
3, 3 parts of maleic anhydride graft HDPE, its density is 0.95g/cm
3, 2 parts of Tissuemat E and 3 parts of anti-ultraviolet ageing agent, be heated to molten condition after mixing;
Three, regulate attemperating unit 10 and cooling device 11, make the temperature of top layer mouth mould 7 and sandwich layer mouth mould 8 be 165 DEG C and 160 DEG C, make the temperature of stock mould 4 and cooling frame 5 be 60 DEG C and 40 DEG C, adjusting screw(rod) 13 makes pressure be 7MPa;
Four, make sandwich layer material under the molten condition of step one under extrusion from sandwich layer runner 1 successively by flange 9, sandwich layer mouth mould 8 and thermal insulation board 12, the top layer mixing of materials of the molten condition of the step 2 extruded at mouth mould 7 place, top layer and top layer runner 2, and then respectively by co-extruding flow channel 3, lengthening mouth mould 6, cooling frame 5 and stock mould 4, obtain high interfacial bonding strength wood plastic composite.
Sandwich layer runner 1 width of the present embodiment is 126mm; Top layer runner 2 width is 60mm; Co-extruding flow channel 3 width is 130mm; Lengthening mouth mould 6 length is 40mm; Distance between the entrance exporting to top layer runner 2 of sandwich layer runner 1 is 10mm; The rounded corner diameter of the meet of the outlet of sandwich layer runner 1 and the entrance of top layer runner 2 is 0.6 times of co-extruding flow channel 3 width.
Embodiment 2, shown in (composition graphs 1) a kind of Fig. 1, mould co-extrusion carries out according to the following steps for the method for high interfacial bonding strength wood plastic composite:
One, sandwich layer material is taken: take 60 parts of wood powders, 32 parts of Recycled HDPEs (HDPE) by mass fraction, its density is 0.95g/cm
3, 3 parts of maleic anhydride graft HDPE, its density is 0.95g/cm
3, 2 parts of Tissuemat E and 3 parts of calcium powders, be heated to molten condition after mixing;
Two, top layer material is taken: take 55 parts of wood powders, 35 parts of HDPE by mass fraction, its density is 0.95g/cm
3, 3 parts of maleic anhydride graft HDPE, its density is 0.95g/cm
3, 2 parts of Tissuemat E, 3 parts of anti-ultraviolet ageing agent and 2 parts of waterproofing agents, be heated to molten condition after mixing;
Three, regulate attemperating unit 10 and cooling device 11, make the temperature of top layer mouth mould 7 and sandwich layer mouth mould 8 be 165 DEG C and 160 DEG C, make the temperature of stock mould 4 and cooling frame 5 be 60 DEG C and 40 DEG C, adjusting screw(rod) 13 makes pressure be 7MPa;
Four, make sandwich layer material under the molten condition of step one under extrusion from sandwich layer runner 1 successively by flange 9, sandwich layer mouth mould 8 and thermal insulation board 12, the top layer mixing of materials of the molten condition of the step 2 extruded at mouth mould 7 place, top layer and top layer runner 2, and then respectively by co-extruding flow channel 3, lengthening mouth mould 6, cooling frame 5 and stock mould 4, obtain high interfacial bonding strength wood plastic composite.
Sandwich layer runner 1 width of the present embodiment is 124mm; Top layer runner 2 width is 60mm; Co-extruding flow channel 3 width is 130mm; Lengthening mouth mould 6 length is 40mm; Distance between the entrance exporting to top layer runner 2 of sandwich layer runner 1 is 10mm; The rounded corner radius of the meet of the outlet of sandwich layer runner 1 and the entrance of top layer runner 2 is 1.2 times of co-extruding flow channel 3 width.
Test one, carry out boundary strength detection to a kind of high interfacial bonding strength wood plastic composite of embodiment 1, test process is as follows:
According to testing standard GB17657-1999, surface bonding strength assay method, boundary strength detection is carried out to a kind of high interfacial bonding strength wood plastic composite of embodiment 1, obtaining its interface bond strength is 3.0Mpa, highlyer than the interface bond strength of existing wood plastic composite improve 5 times, interface bond strength is high.
Test two, carry out boundary strength detection to a kind of high interfacial bonding strength wood plastic composite of embodiment 2, test process is as follows:
According to testing standard GB17657-1999, surface bonding strength assay method, boundary strength detection is carried out to a kind of high interfacial bonding strength wood plastic composite of embodiment 2, obtaining its interface bond strength is 3.5Mpa, highlyer than the interface bond strength of existing wood plastic composite improve 6 times, interface bond strength is high.
Claims (7)
1. a co-extrusion is for the method for high interfacial bonding strength wood plastic composite, it is characterized in that this preparation method utilizes a kind of co-extrusion for the mould co-extrusion of high interfacial bonding strength wood plastic composite for high interfacial bonding strength wood plastic composite, this preparation method carries out according to the following steps:
One, a kind of co-extrusion is made up of sandwich layer runner (1), top layer runner (2), co-extruding flow channel (3), stock mould (4), cooling frame (5), lengthening mouth mould (6), top layer mouth mould (7), sandwich layer mouth mould (8), flange (9), attemperating unit (10), cooling device (11), thermal insulation board (12) and screw rod (13) for the mould of high interfacial bonding strength wood plastic composite; Distance between the entrance exporting to top layer runner (2) of its center core layer runner (1) is not less than 5mm, the meet of the outlet of sandwich layer runner (1) and the entrance of top layer runner (2) is arranged to rounded corner, attemperating unit (10) is positioned at top layer mouth mould (7) and sandwich layer mouth mould (8) is inner, cooling device (11) is positioned at stock mould (4) and cooling frame (5) is inner, thermal insulation board (12) is positioned between top layer mouth mould (7) and sandwich layer mouth mould (8), and it is inner that screw rod (13) is positioned at top layer runner (2);
Two, attemperating unit (10) and cooling device (11) is regulated respectively, the temperature of top layer mouth mould (7) and sandwich layer mouth mould (8) is made to be 135 ~ 180 DEG C, the temperature of stock mould (4) and cooling frame (5) is made to be 15 ~ 80 DEG C, skin depth adjusting screw(rod) (13) needed for the high interfacial bonding strength coextrusion wood plastic composite of preparation, regulates pressure;
Three, the sandwich layer material under molten condition is made to pass through flange (9), sandwich layer mouth mould (8) and thermal insulation board (12) successively from sandwich layer runner (1) under motive force effect, in the top layer mixing of materials of the molten condition that mouth mould (7) place, top layer and top layer runner (2) extrude, and then respectively by co-extruding flow channel (3), lengthening mouth mould (6), cooling frame (5) and stock mould (4), obtain high interfacial bonding strength wood plastic composite.
2. a kind of co-extrusion according to claim 1 is for the method for high interfacial bonding strength wood plastic composite, it is characterized in that adjusting screw(rod) in step 2 (13), makes pressure be 3MPa ~ 25MPa.
3. a kind of co-extrusion according to claim 1 and 2 is for the method for high interfacial bonding strength wood plastic composite, it is characterized in that step 3 center core layer material is wood powder, waste or used plastics and filler.
4. a kind of co-extrusion according to claim 3 is for the method for high interfacial bonding strength wood plastic composite, it is characterized in that filler described in step 3 is maleic anhydride graft high density polyethylene (HDPE), lubricant and calcium powder.
5. a kind of co-extrusion according to claim 3 is for the method for high interfacial bonding strength wood plastic composite, it is characterized in that step 3 mesexine material is wood powder, plastics and functionalized.
6. a kind of co-extrusion according to claim 5 is for the method for high interfacial bonding strength wood plastic composite, it is characterized in that described functionalized is anti-ultraviolet ageing agent, lubricant, fire retardant, antiseptic or waterproofing agent wherein one or more mixture by any ratio.
7. a kind of co-extrusion according to claim 4 is for the method for high interfacial bonding strength wood plastic composite, it is characterized in that described lubricant is a kind of in Tissuemat E or paraffin or both are by the mixture of any ratio.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310021367.7A CN103144270B (en) | 2013-01-21 | 2013-01-21 | Method of preparing high interface bonding intensity wood-plastic composite in co-extrusion mode |
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| CN201310021367.7A CN103144270B (en) | 2013-01-21 | 2013-01-21 | Method of preparing high interface bonding intensity wood-plastic composite in co-extrusion mode |
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| CN103144270B true CN103144270B (en) | 2015-07-15 |
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| CN104441552A (en) * | 2014-06-28 | 2015-03-25 | 河南盛世塑业有限公司 | Co-extruding mould |
| CN104441553A (en) * | 2014-07-21 | 2015-03-25 | 河南盛世塑业有限公司 | Gumming co-extrusion mold |
| CN106515156A (en) * | 2016-10-27 | 2017-03-22 | 东北林业大学 | Extruded sandwich structure wood-plastic composite material and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310537A (en) * | 2010-07-06 | 2012-01-11 | 上海新必工贸有限公司 | Plastic section strip composite co-extrusion mold |
| CN202318867U (en) * | 2011-11-10 | 2012-07-11 | 湖北高新明辉模具有限公司 | Wood-plastic-coated coextrusion mould |
| CN202528422U (en) * | 2012-04-06 | 2012-11-14 | 黄石市飞翔模具有限公司 | Coextrusion mold for wood-plastic sections |
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2013
- 2013-01-21 CN CN201310021367.7A patent/CN103144270B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310537A (en) * | 2010-07-06 | 2012-01-11 | 上海新必工贸有限公司 | Plastic section strip composite co-extrusion mold |
| CN202318867U (en) * | 2011-11-10 | 2012-07-11 | 湖北高新明辉模具有限公司 | Wood-plastic-coated coextrusion mould |
| CN202528422U (en) * | 2012-04-06 | 2012-11-14 | 黄石市飞翔模具有限公司 | Coextrusion mold for wood-plastic sections |
Non-Patent Citations (1)
| Title |
|---|
| 李中秋,王清文,李影.挤出木塑复合异型材模具的设计要点.《林产工业》.2010,第36-39页. * |
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| CN103144270A (en) | 2013-06-12 |
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